PENGARUH PEMBERIAN JUS JERUK MANIS PACITAN (CITRUS SINENSIS) TERHADAP NILAI VO2MAX PADA ATLET FUTSAL DI SEKOLAH MENENGAH ATAS NEGERI 16 BATAM

Abstract

Low aerobic capacity in futsal athletes, reflected by poor VO2Max levels, impairs performance during training and matches. VO2Max measures the body's maximum oxygen consumption during intense physical activity (ml/kg/min), where higher values indicate superior aerobic energy production. Baseline data revealed that most futsal athletes had poor-to-moderate VO2Max, reducing endurance and highlighting the need for effective, safe, and practical nutritional interventions. Pacitan sweet orange (Citrus sinensis) contains glucose, vitamin C, and potassium, which support energy, reduce oxidative stress, and maintain muscle and heart function. This study aims to analyze the effect of Pacitan sweet orange juice on VO2Max levels in futsal athletes. A quasi-experimental pretest–posttest without control group design was conducted using total sampling (n = 15 athletes). The intervention consisted of consuming 300 ml of sweet orange juice once daily for 7 days. VO2Max was measured using the Balke Test before and after the intervention. Data normality was assessed with the Shapiro-Wilk test, followed by a paired t-test to evaluate VO2Max differences. The results showed a significant increase in VO2Max from 45.27 ± 4.81 ml/kg/min to 52.59 ± 3.16 ml/kg/min, with a mean difference of 7.32 ± 2.93 ml/kg/min (p = 0.001, p < 0.05). In conclusion, consuming Pacitan sweet orange juice for 7 days effectively improves aerobic capacity in futsal athletes, demonstrating potential as a practical, affordable natural beverage to support physical performance.